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Full text of "Metallurgy Of Cast Iron"

624                                         INDEX.
Test Bars—Continued.                                                       PAGE.
bars made off the same pattern and tested the same distance  between   supports   ......................474, 476
Necessity of records being taken, of the least difference in the area of bars made off the same pattern........ 475
Impracticability of formulas in vogue (to 1902) for computing the strength per square inch of cast iron in different cross sections and lengths ..............477, 530
Utility and necessity of using a micrometer to measure the area of ......................................478-480
The impracticability of casting two test bars of exactly   ' the same area at the breaking point.................. 479
Manner in which test bars should be placed for transverse testing ....................................481-482
Comparison of lines of crystallization in round and square ...........................................483-484
Uneven cooling causing internal strains in  ............ 485
Examples of the uniformity of grains in round and non-uniformity in square............................486-487
Indorsement of the A. F. A. of round bars and recommendation of i*X-inch diameter as the smallest to be used ..................................487, 573, 576, 577
Deductions from tests showing the evils of casting bars flat and the difference in the results of such methods.. 48;;
The importance of having uniform temperature of metal in pouring .......................526, 527, 540, 547, 580
The  utility of   .....................................528-531
The different area and lengths of bars in use......... 530
The practicability of using bars il/&" diameter and larger..........................................533, 573
The necessity of using one size of bar in making comparative tests of one or more grades of iron......533, 575
The grade of iron that either one of three bars recom-
.. mended by A. F. A. and the author are best suited for .........................................533, 577-579
The first set of test bars made for the A. F. A......... 541
The character, size and number of test bars made for the A. F A........................................551,553an inch ...................-.....•----• • • • •......594nalyses...............378-379,381s.. 270 Mixtures   for   gun   carriages.......................274, 275n of........... 245